عادل عاشور منصور ابوسديل, (0-0)

Miscible gas flooding using natural Carbon Dioxide gases is currently being investigated as possible EOR process in a number of Libyan reservoirs. The major reason for selecting miscible gas flooding as an EOR process was because of the adaptability and possible gas availability at reasonable cost. CO2 and hydrocarbon gases could achieve miscibility with a number of reservoir oils at current conditions [pressure] through a multi-contact miscibility process. The main disadvantages of immiscible gas flooding is the high mobility ratio so that the gases have the tendency to channel through the oil which results in by-passing much of the oil in the reservoir and low sweep efficiency. To solve this problem, a technique was tested consisting of alternately injecting small solvent [hydrocarbon gas or CO2] and water slugs. The slug of water reduces the speed of the solvent which results in reducing the chance of solvent fingering an improving the mobility of the system. The main objective of this study is to investigate the effect of WAG RATIO on overall recovery of miscible flooding. The following (WAG) ratios were tested: 1:1, 2:1, 1:2, and 3:1. Straight carbon dioxide injection was tested as well and a comparison between different systems is presented. Economical studies of different systems are also presented and risk assessment of carbon dioxide flooding is discussed.
Wanis Salem Abdala Alfrgani, Abdallah Mohameed Alshobaky, (9-2016)

Abstract This work presents correlations between experimentally generated magnetic field strengths and computationally modeled field strengths. The experimental set-up comprised a C-shape structure designed to generate strong magnetic field strengths. The sections of the C-structure were individual solenoids made from copper-wound low carbon steel. These sections were connected such that the overall structure formed a continuous conduit for the magnetic flux and concentrated the magnetic field into an air gap. This experimental set-up could be used for magnetic annealing, or alternatively to measure the magnetostrictive strain properties of suitable materials, placed in the air gap. Magnetic field strengths of approximately 1.0 Tesla (T) were measured using a magnetic field strength meter. Finite Element Method Magnetics (FEMM) computational modeling software was used to model the design and predict field strengths. Modeled field strengths fell short of practical measurements. The efficiency of the apparatus in producing high fields is reduced due to effects related to drilling and machining of the steel core. Other reasons for discrepancies include the configuration of the C-shape, the properties of the core material, and skin effects. By building these considerations into the FEMM model, a more accurate representation of the workings of the C-shape set-up was achieved.
, , , , (1-2016)